FAQ

All Platforms

My playback is too slow. How can I improve it?

Check that you have:
- Window->Preferences
  - OpenGL
    
    Color Buffers’ Accuracy set to Automatic (preferred) or Fast.
  - Timeline
    
    Preview Thumbnails off.
  - Playback
    
    Auto Hide Pixel Bar checked or optionally hide the pixel bar or set the UI to presentation mode.
- Panel->Settings
  - Cache Gigabytes
    
    Set to 4GB at least (the default is half your memory)

Linux

My playback is too slow. How can I improve it?

Check that you have:
- Help->About
  - Go to the HW tab.
    
    Check the GPU information and make sure that Vendor/Renderer is not Mesa, but the appropriate for your graphics card. For example:
    
    Vendor: NVIDIA Corporation Renderer: NVIDIA GeForce RTX 3080/PCIe/SSE2 Version: 4.6.0 NVIDIA 535.171.04
    
    Max. Texture Size:32768 x 32768
    
    If it is using Mesa, you may need to configure XWayland/Wayland correctly for your OS and graphics card. Or use mrv2 not on Wayland but on X11/Xorg.
    
    On Ubuntu 22.04.4 LTS, you should install the proprietary NVidia drivers 535 at least and do:
    
    sudo apt install libnvidia-egl-wayland1
    
    Note that NVidia’s EGL under Wayland seems buggy and may result on random stopping of the playback until you move the mouse. If you run into that, use XWayland or log in onto X11. To use XWayland, set:
    
    export FLTK_BACKEND=x11

Windows

After an install with file associations all icons appear with the mrv2 logo. How can I display the picture thumbnails once again?
- It is a bug in Windows, but it can be worked around. You manually should select one file extension that you want thumbnails from and select:
```
Open with->Choose another app
```
  Then select “Photos” from the menu and “Always”. This will restore the thumbnail, but it will remove the association to mrv2. To once again associate mrv2 to the file, go again to:
```
Open with->Choose another app
```
  But this time select “mrv2 Media Player Latest” and “Always”. This will associate mrv2 back to the file, but leave the thumbnails. You will see a small icon of mrv2 on the right bottom corner of the thumbnail.